Sheet-metal heat sink for electronic semiconductor devices



FIG. 1 is a perspective view of a sheet-metal heat sink for electronic semiconductor devices showing my new design; the broken lines being shown for illustrative purposes, only;

FIG. 2 is a front elevational view of the same heat sink;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof, looking toward the right side of the heat sink as it is shown in FIG. 1;

FIG. 5 is a side elevational view thereof, looking toward the left side of the heat sink as it is shown in FIG. 1;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a sheet-metal heat sink for electronic semiconductor devices, substantially as shown and described. 